you need 4 and they are worth their weight in gold. your exhaust will not move once these are on. you know how those lowered hondas have the exhaust that sways all over. you will not have that at all once these are installed. i have a set on my car and they are great. We have 4 in stock if you need them in red.
Since they are stiffer, do they transfer the exhaust vibration to the car? Most people seem to like them, but there was one guy who had problems with vibration. How much is the total for 4 red ones shipped to Covina, California?
bought mine from cobb tuning when i put my BPM GT system on and have had no problems with them at all, seen a couple WRX with exhaust but no upgraded hangers and it does move alittle, but mine is stiff and notice no more noise inside because of them.